SAN FRANCISCO — Amid heavy security and the splendor of his faith’s most sacred rites, the new Roman Catholic archbishop of San Francisco assumed office Thursday without referring to the distress his appointment has aroused in this gay-friendly city, but offering self-deprecating jokes about his recent drunken driving arrest.

SAN FRANCISCO — Federal prosecutors have launched a crackdown on pot dispensaries in California, warning the stores that they must shut down in 45 days or face criminal charges and confiscation of their property even if they are operating legally under the state’s 15-year-old medical marijuana law.